[tsp]

I used Lit in a client project, which still seems to be the most common way to author web components. Styling and composition was really hard, much harder than in typical React, Vue or Svelte projects. It is future proof to build the atoms of a design system as web components (e.g. sliders, buttons and so on), but component composition is better done in a proper framework (e.g. Vue). This way companies could more easily start new projects with their existing design system, independent of the framework. I wouldn’t consider building a complex applications with Lit again, just the design system atoms.